--- title: "Magma V2.10-17 Patch Notes" canonical: "https://docs.magma-maths.org/patchnotes/2.10-17.html" source: "https://docs.magma-maths.org/patchnotes/2.10-17.md" --- # Magma V2.10-17 Patch Notes ## Groups - A bug in computing `Classes` of a matrix group (reported by Eamonn O’Brien) has been fixed. The bug caused a segmentation fault when there were many classes with identical order/length. - A number of bugs in the code for computing automorphism groups and testing isomorphism of finite permutation and matrix groups have been fixed. - A bug in membership testing for subgroups of a `GrpPC` has been fixed. The bug was reported as a problem with `IsNormal` by Eamonn O’Brien and Mike Newman when working with a large 2-group. - It is now possible to form sequences and sets of elements of Lie groups. ## Language - A bug which allowed strings to be indexed by non-integers has been fixed. ## Rings and Fields - A bug in the `MaximalOrder` computation over base fields of degree 32 has been fixed. - Divisor creation in function fields failed sometimes if the orders were created in special ways. - `SplittingField` for polynomials with rational coefficient is now supported. - A bug in p-adic powering with very large exponents has been fixed. - Several bugs in `XGCD` over p-adic fields have been fixed. - Several minor problems in the ECPP code for proving primality of integers has been fixed. When checking a large number of primes, a segmentation fault could have occurred. - A bug in the factorization of polynomials over positive-characteristic function fields has been fixed. - A problem in the intersection of fractional ideals of number fields causing Magma to die has been fixed. ## Young Tableau - A memory bug in `InverseRSKCorrespondence` causing a segmentation fault has been fixed. - A function `Positions` which searches the cells of a tableau for a given entry has been provided. - The syntax `M<[x]> := ...` has been installed for ordered monoids and plactic monoids - Some new coercions have been provided. These include coercions between the integers and the ordered monoid of positive integers